1.

If 15z7 is a multiple of 3 where 'z' is a digit , find the value of z​

Answer»

ong>Answer:

acc. to DIVISIBILITY RULE of 3

sum of digits should be the multiple of 3

therefore, we have 15Z7

1+5+Z+7= 13+Z

to make it multiple of 3 it should also COME in table of 3

so after 13 it can be nearest to 15

15-13=Z

2=Z

hence answer is 2

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